Randomization list anonymization is the masking of the link between a subject and a treatment arm. It supports ICH E6(R2) good clinical practice and blinding. anonym.plus runs offline and keeps the allocation table usable.
When this applies
A statistician shares the allocation table for a check, but the team must stay blind. The sheet ties each subject code to an arm and a kit.
How anonym.plus handles it
- Open the allocation table (XLSX or CSV) in anonym.plus.
- The tool flags subject codes, kit numbers, and any names.
- Local OCR reads a scanned paper list if you add one.
- Confirm the flags and decide what stays blinded.
- Mask the subject-to-arm link, or swap codes for tokens.
- Save the masked table locally with no upload.
What you need to provide
- The table (XLSX, CSV, PDF, or scan).
- An operator: Mask the link, or Replace codes with tokens.
- Optional: a token map held apart from the shared file.
PHI entity types detected
| Category | anonym.plus entity type | Example |
|---|---|---|
| Subject code | ID | subject 0312 → [TOKEN_A] |
| Kit number | ID | kit KIT-8842 → [KIT] |
| Names | PERSON | entered by N. Roy → [STAFF] |
| Dates | DATE_TIME | allocated 07/03/2026 → [DATE] |
| Site | LOCATION | Site 03, Pune → [SITE] |
| Contact | EMAIL_ADDRESS | rand@example.in → [EMAIL] |
Compliance achieved
- Helps keep blinding under ICH E6(R2) GCP.
- Stays offline, so the tool itself needs no BAA.
- On-device AES-256-GCM guards the working file.
- Supports GDPR Art. 9 where the sheet holds subject data.
Anonymize randomization lists offline — see plans & start free →
Limitations & cautions
Masking the link protects the blind, but a kit number can still trace back through pharmacy records. Decide which columns must be hidden for your blinding plan, and keep the unmasked master under strict access apart from the team.
Frequently asked questions
Why anonymise a randomization list?
The list maps each subject to a treatment arm. If the team sees it, the blind is broken. Masking the link lets someone check the table's structure without learning who got what.
Can the team stay blind?
Yes. Mask the arm column or the subject-to-arm link. The shared sheet then shows the layout without revealing the allocation.
Who keeps the real list?
Only the unblinded statistician or pharmacy, under strict access. The master stays on a protected store, apart from the wider team.